From: Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com> Date: Mon, 15 Apr 2024 21:24:35 +0000 (+0200) Subject: [3.12] gh-117804: Document how to suppress PGO unprofiled source warnings (GH-117859... X-Git-Tag: v3.12.4~226 X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=556fb3675c87ed1132caa5ccec94fc3f8778b1d7;p=thirdparty%2FPython%2Fcpython.git [3.12] gh-117804: Document how to suppress PGO unprofiled source warnings (GH-117859) (#117912) (cherry picked from commit 757891ee8ad61a864444c1fdb764d81bc8a11189) Co-authored-by: Erlend E. Aasland --- diff --git a/Doc/using/configure.rst b/Doc/using/configure.rst index 45263a3ee175..0e605b38d421 100644 --- a/Doc/using/configure.rst +++ b/Doc/using/configure.rst @@ -302,6 +302,15 @@ also be used to improve performance. GCC is used: add ``-fno-semantic-interposition`` to the compiler and linker flags. + .. note:: + + During the build, you may encounter compiler warnings about + profile data not being available for some source files. + These warnings are harmless, as only a subset of the code is exercised + during profile data acquisition. + To disable these warnings on Clang, manually suppress them by adding + ``-Wno-profile-instr-unprofiled`` to :envvar:`CFLAGS`. + .. versionadded:: 3.6 .. versionchanged:: 3.10